Reversing contactor apparatus with locking

An electric reversing contactor comprising:

• a casing having first and second compartments located on the respective sides of a central housing;
• first and second electromagnet devices having first and second respective coils, first and second energizing circuits respectively connected to said coils;
• first and second respective armature pieces, each movable from a rest to a work position when the respective coil is energized by the respective energizing circuit;
• first and second power switch devices and first and second mechanical linkages, receptively coupling the first and second power switch devices to the first and second armature pieces;
• said first and second electromagnet devices, power switch devices and mechanical linkages being respectively housed in said first and second compartments;
• unitary mechanical and electrical interlocking means placed within the central housing, said interlocking means comprising a movable locking piece having a rest position and first and second actuated positions, first and second locking switches and actuating means coupling said movable locking piece to said first and second locking switches for respectively closing the first switch when the movable locking piece is in the first actuated position, and the second switch when the movable locking piece is in the second actuated position;
• first and second further mechanical means, respectively cooperating with said first and second electromagnet devices and with said movable locking piece for preventing simultaneous motion of the first and second armature pieces;
• and means electrically connecting said switches to said coils for preventing simultaneous energization of said electromagnet devices.